Still Into You

"F-forgiveness N-nithael, that's all I need" I was shaking when I said those words,but his face,his face were still emotionless , that's not what it is before.I shaked my head not wanting to remember anything about him.

"You fucked me up when you left me, I should return the favor" With that, he stormed out of the cafe. What does he mean by that?